Glass-cutting box



(No Model.)

J. G. C. FARNHAM. GLASS CUTTING BOX.

No. 425,770. Patented Apr. 15, 1890.

witnesses I W 7 6M QM 7 W I .UNITED STATES PATENT OFFICE.

JOSHUA G. C. FARNHAM, OF RIOHMOND, MAINE.

GLASS-CUTTING 'BOX.

SPECIFICATION forming part of Letters Patent No. 425,770, dated April 15, 1890.

Application filed January ll, 1890. Serial No. 336,631. (No model.)

To all whom it may concern:

Be it known that I, JOSHUA G. O. FARN- HAM, a citizen of the United States, residing at Richmond, in the county of Sagadahoc and State of Maine, have invented certain new and useful Improvements in Glass-Cutting Boxes; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to glass-cutting boxes, and my object is toproduce a more simple, cheap, and durable device than has hitherto been in use. Y

WVith these ends in view my invention consists in the peculiar features and combinations of parts more fully described hereinafter, and pointed out in the claims. I

Referring to the accompanying drawings, Figure l is a top view of my complete device, and Fig. 2 a similar view showing the cover removed.

The bottom of the box consists of a flat board A of suitable dimensions and provided with side strips B and end strip 0, the lower end being left open for the insertion of the glass to be cut. 7

Blocks D are secured at the upper corners of the box, and the cover E rests on them I and is secured to them and to the back strip 0.

The side strips B are provided on their inner edges with a series of notches or slots b, preferably one inch apart, and commencing one inch from the lower edge of the blocks D. These notches are serially numbered and serve as an inch scale for measuring off the glass. The rule F fits-between the strips B and has projections f on either end which fit in the notches b. This rule also has a scale markedonit, and maybe of anyform straight, curved, or angular according to the shape it is desired to cut the glass.

Beneath the cover E, at the upper end of the box, is a sliding strip G, which exactly fits between the blocks D, and the lower edge of which in its normal position exactly registers with the lower edge of the'cover and also of the blocks D. At the middle of the upper surface of this strip is secured a metallic plate 9, having a scale with fractions of the inch marked on it.

The sliding strip G is operated by means of a pair of bell-crank levers H, which consist of angular metal plates pivoted to the bot-tom A and having elongated slots h in their opposite ends. The lower ends of these levers extend beneath the strip G and operate in chambers g, formed in said strip, which are made of sufficient size to admit of free play of the levers, and which are provided with pins 1', which engage the slots 71, and slide in them.

The slots in the upper ends of the levers H are engaged by pins j, secured on a laterallysliding bar J, which is let into a channel or groove 0.in the base A. On the right-hand end of this bar is secured a bracket m, which is provided with an upwardly-projecting por tion a, having a threaded aperture 47/. This aperture is engaged by the threaded end of a thumb-screw R, which extends through the block D and is provided on its outer end with a head D, by means of which it is turned.

. The sliding bar J is limited in its play by a block Q in the left-hand end of the channel 0 and a similar block g in the right-hand end.

The preferred construction of my device having been set forth, I will now proceed to describe its operation. Supposing that it is desired to cut a strip of glass two and onehalf inches in width, the glass will be placed on the bottom A with its upper edge against the edge of the strip G. The rule will now be fitted in the notches marked 3 in. and the thumb-screw R turned until the 9 in. mark on the scale 9 registers with the edge of the cover E, when the glass can be out along the rule F and will have the desired width.

It will be seen that upon turning the thumbscrew R to the left the bar J will be forced to the left and the upper ends of the bell-crank levers carried with it, whereby the lower ends will be forced down and will thus push out the strip *G. WVhen the thumb-screw is turned back in the opposite direction, the reverse operation will take place.

Slots 1' are made in the back strip 0 for the entrance of the upper ends of the levers when the strip G is in its normal position.

It is evident that many slight changes which might suggest themselves to a skilled mechanic could be resorted to without departing from the spirit and scope of my invention; hence I do not limit myself to the precise construction shown.

Having thus described my invention, what I- claim as new, and desire to secure by Letters Patent, is

1. In a glass-cutting box, a bottom piece having side strips secured thereto, a rule removably fitting between said side strips, a

[0 cover over the upper end of the box, and a bar movable beneath said cover and provided with a scale arranged to register with the edge of the cover, as and for the purpose described.

2. In a glass-cutting box, the combination of a movable bar, levers connected therewith, and a thumb-screw for operating said levers to force out and in said bar, substantially as described.

3. In a glass-cutting box, the combination 20 of a movable strip, a laterally-movable bar, levers pivotedto the box-body and connected at their opposite ends to the bar and strip, respectively, and a thumb-piece for recipro eating said laterally-movable bar and thereby 2 5 said movable strip, as and for the purpose described.

In testimony whereof I aifix my signature in presence of two witnesses.

JOSHUA G. C. FARNHAM.

Witnesses:

WM. T. HALL, DAVID C. AMEs. 

